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Content Benchmark P.12.B.3
Students know the strength of the electric force between two objects increases with charge and
decreases with distance. I/S
Sample Test Questions
1st Item Specification: Explain how electric forces change when the distance between the
two charges changes and/or when the magnitude of the charges changes.
Depth of Knowledge Level 1
1.
Which of the following statements is true about the magnitude of force between two objects
each holding an electrical charge of +3 x 10-3 Coulombs?
A. The hotter the objects are, the greater the electrical force between them.
B. The closer the objects are, the greater the electrical force between them.
C. The faster the objects move, the greater the electrical force between them.
D. The colder the objects are, the greater the electrical force between them.
2.
Analyze the diagram below, which shows two electrically charged objects. Use this
diagram to answer the following question.
Which of the following would cause a decrease in the magnitude of the electrical force
between the two objects?
A. Decrease the temperature of the objects.
B. Increase the temperature of the objects.
C. Decrease the distance between the objects.
D. Increase the distance between the objects.
3.
Analyze the diagram below showing two charged objects. Use this diagram to answer the
following question.
Which of the following would cause an increase in the electrical force between the two
objects?
A. Increase the distance between the two objects.
B. Make the charge on one object positive.
C. Make one object hotter than the other.
D. Increase the charge on one of the objects.
4.
Which of the following pairs of variables affect the magnitude of the electrical force
between two electrically charged objects?
A. The kind of charge on the objects and the distance between them.
B. The temperature of the charged objects and the distance between them.
C. The material that the charged objects are made of and the distance between them.
D. The magnitude of the charge on the objects and the distance between them.
5.
An electrically charged object is surrounded by an electric field. An object with a like
charge is brought into the electric field and the two objects repel. Use the following two
diagrams to answer the question below.
Which of the following statements is true about the magnitude of the electric force between
two electrically charged objects in Model A compared to those in Model B?
A. The magnitude of the force is greater in Model A because the magnitude of the
charges are greater.
B. The magnitude of the force is greater in Model B because the magnitude of the
charges are greater.
C. The magnitude of the force is lower in Model B because the magnitude of the charges
are greater.
D. The magnitude of the force in Models A and B are equal because the distances
between the charges are equal.
6.
An electrically charged object is surrounded by an electric field. An object with a like
charge is brought into the electric field and the two objects repel. Use the following two
diagrams to answer the question below.
Which of the following statements is true about the magnitude of the electric force between
two electrically charged objects in Model A compared to those in Model B?
A. The magnitude of the force is greater in Model B because the magnitude of the charges
is greater.
B. The magnitude of the force is greater in Model A because the magnitude of the charges
is greater.
C. The magnitude of the force is greater in Model B because the distance between the
charges is greater.
D. The magnitude of the force is greater in Model A because the distance between the
charges is less.
Depth of Knowledge Level 2
7.
The diagrams below each show two electrically charged objects separated by the distances
indicated. Use the two diagrams to answer the question below.
Diagram
I
2e-
Diagram
II
2e-
2e1 meter
2e2 meters
Which of the following statements correctly compares the magnitude of the electrical force
between the electrically charged objects in Diagrams I and II?
A. The magnitude of the force between the objects in Diagram I is greater than the
magnitude of the force between the objects in Diagram II.
B. The magnitude of the force between the objects in Diagram II is greater than the
magnitude of the force between the objects in Diagram I.
C. The magnitude of the force between the objects in Diagram I is equal to the magnitude
of the force between the objects in Diagram II.
D. There is not enough information to compare the magnitude of the force between the
objects in Diagram I and the objects in Diagram II.
8.
The magnitude of electric force between two electrically charged objects will
A. increase as the level of charge on the objects increases and increase as distance between
them increases.
B. increase as the level of charge on the objects increases and decrease as the distance
between them increases.
C. decrease as the level of charge on the objects increases and increase as the distance
between them increases.
D. increase as the level of charge on the objects increases but stay the same as the distance
between them increases.
9.
The four following diagrams below each show two electrically charged objects separated by
the distances indicated. In the diagrams, “C” stands for Coulomb, which is a unit of
electrical charge. Use the four diagrams to answer the following question.
In which model is the magnitude of the force of attraction between the two objects
STRONGEST?
A. Diagram I
B. Diagram II
C. Diagram III
D. Diagram IV
10. The four diagrams below each show the electrically charged objects separated by the
distance indicated. Use the four diagrams to answer the following question.
In the diagrams “C” stands for Coulomb, which is a unit of electrical charge.
Identify the two Diagrams in which the magnitude of the electrical force between objects is
EQUAL.
A. Diagram I and Diagram II
B. Diagram I and Diagram III
C. Diagram II and Diagram III
D. Diagram III and Diagram IV
Content Benchmark P.12.B.3
Students know the strength of the electric force between two objects increases with charge and
decreases with distance. I/S
Answers to Sample Test Questions
1. B, DOK Level 1
2. D, DOK Level 1
3. D, DOK Level 1
4. D, DOK Level 1
5. B, DOK Level 2
6. D, DOK Level 2
7. A, DOK Level 2
8. B, DOK Level 2
9. A, DOK Level 1
10. B, DOK Level 2